Orbit in Sonic Gravity and you will know that kinetic energy bends time--the soul mate of spacetime--the equivalent and indistinguishable from the commonly understood phenomenon that the potential of mass energy, according to Newton's Law of Gravitation, bends space.  And when you see that kinetic energy bends time by a process known as time dilation, and the Higgs field, charged with leashing all the matter and energy to our instance of Planck Time, is stretched by that dilation . . . then you will understand that quantum gravity is negative energy density--tension in the Higgs string caused by changes in kinetic energy . . . a.k.a. inertia, and you will know that you are viewing the universe through the eyes of a madman.  https://www.youtube.com/watch?v=RerYywAnpRY